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Subject: Re: false positives
From: Tom Neff <tneff @ grassyhill . net>
Date: Wed, 26 Feb 2003 10:17:10 -0500
To: list-managers @ greatcircle . com
In-reply-to: <488.1046239495@kanga.nu>
References: <4373E580-4904-11D7-B4B5-0003934516A8@plaidworks.com><15964.12072.364914.86758@gargle.gargle.HOWL> <29202.1046229649@kanga.nu> <130798312.1046214147@[192.168.254.79]> <488.1046239495@kanga.nu>

--On Tuesday, February 25, 2003 10:04 PM -0800 J C Lawrence <claw@kanga.nu>
wrote:
> On Tue, 25 Feb 2003 23:02:27 -0500 
> Tom Neff <tneff@grassyhill.net> wrote:
>> --On Tuesday, February 25, 2003 7:20 PM -0800 J C Lawrence
>> <claw@kanga.nu> wrote:
>>> On Tue, 25 Feb 2003 22:06:16 -0500 Barry A Warsaw
>>> <bwarsaw@python.org> wrote:
> 
>>> The difference is that those are your fault, not your software's
>>> fault.
> 
>> That is, as they say, a distinction without a difference.  A missed
>> legitimate email has no way of knowing whether it was missed as the
>> result of software miscalibration or a tired eye on the 1AM Inbox.
> 
> True, objectively, but there is a significant subjective difference.  In
> one way I had the opportunity to see the mail, and didn't, and the other
> way something hid it from me without my explicit per-message consent.
> 
> Think like a control freak...

I always think like a control freak. :)  A good spam filter doesn't write to
/dev/null, it reroutes to a holding pen.  There, just like with a nonfiltered
approach, I have the opportunity to see it (now or later) if I want.

This sometimes happens when I order from a new merchant.  These days what I
tend to do (unless I want to maintain an 'account' of some kind) is create a
temporary email alias, like E_030226@grassyhill.net, and use that for my
transaction.  (This allows me to go through my aliases file every week and
delete old temp aliases, so that even if a merchant sells its database the
addy is useless for future spam.)  So I make my purchase, carefully noting
that the paisley waffle iron is in stock :) - and also use a one-time
"virtual card number" from Citibank where possible - and wait for my emailed
confirmation of charge and shipping.  Sometimes I don't see it right away,
and sometimes that's because the merchant sends confirms that Bayes-test a
bit spammy.  So I just pop open the 'spamhold' folder in Mulberry, and bang
there the confirm is.  I drag it to a holding folder called 'spamgood' which
is harvested once a minute by a cron job that takes each message, whitelists
it in the Bayes filter, and throws it over into my Inbox.  Now I'm good with
that merchant for as long as I want to keep the alias around.

I just thought I'd give an example of a technique.

The other thing I do is periodically purge that 'spamhold' folder, but before
I do, I search for all messages sent *personally* to my one or two real-McCoy
addresses, and do a quick scan of the From field to see if anyone I know is
worth rescuing.  Anything I see (a musician's tour dates for example) I drag
to Spamgood.  Then I purge and reset the spamhold folder.

I also have a log (1 line per email) that I never purge, so if by chance
someone says to me "I sent you that powerpoint file three months ago" I can
check.


References:
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From: James Lick <jlick@drivel.com>
Next: Re: false positives - junkmail
From: Chuq Von Rospach <chuqui@plaidworks.com>
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From: J C Lawrence <claw@kanga.nu>
Next: Re: [Fwd: EFF Mailing List Query]
From: "Roger B.A. Klorese" <rogerk@queernet.org>

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